Rotary printing machine



Nov. 7, 1939. F. c. MARQ UARDT 2.178.639

ROTARY PRINTING MACHINE Filed May 28, 1938 3-Sheets$heet l 64 M j, i 6;?

0'5 v a? 71 as J @MFWW 4w; ATTORNEY Nov. 7, 1939. F. c. MARQUARDT ROTARYPRINTING MACHINE Filed May 28, 1938 3 Sheets-Sheet 2 INVENTOR WWW 9;;ATTORNEY.

Nov. 7, 1939. F. c. MARQUARDT 2,178.639

ROTARY PRINTING MACHINE Filed May 28, 1938 3 Sheets-Sheet 3 PatentedNov. 7, 1939 UNl'i' mi i s a PA ti l r Application li lay 28, 1938,Serial No. 210,613

26 Claims.

The invention relates to rotary printing machines, and more particularlyto a machine of this type for making impressions from engraved, intaglioor undersurface steel printing plates.

In printing from engraved, intaglio or undersurface printing plates, inkis applied to the entire surface of the plate, and this surface is thenwiped and polished, the wiping of the plate serving to fill and pack thelines of the plate with. ink and remove surplus ink from the plate. Thepolishing of the plate is for the purpose of removing any ink which maybe left upon the top or non-printing surface of the plate by the wipingcloths.

While, when printing from fiat plates, a wiping mechanism is used, thepolishing of the plate is usually by hand. With a rotary plate, however,

mechanical wiping and polishing mechanisms must both be used, since theplate is inaccessible for hand polishing and the plate cylindercontinuously rotates.

The bending of steel plates for use upon the cylinder of a rotaryprinting machine is not only a difilcult procedure, but one involvingconsiderable expense and loss because of the accidental destruction ofplates.

Rotary printing machines of the type to which the invention relates,were in use for many years prior to my present invention, and in suchmachines, as well as in machines printing from flat plates, there hasbeen an accepted rule for many years that an effective wiping andpolishing of the plate cannot be secured with a movement of the plate inexcess of a rate of about seventy feet per minute.

In machines for printing from fiat plates it has been the custom formany years to use four plates upon the machine, in order to secure asuitable output, such machines with four plates, being capable of makingabout twelve impressions per minute.

In rotary machines, however, the practice has been to operate thesemachines at about eight revolutions per minute, and to use two orsometimes three plates upon each machine, in order to have an output ofsixteen or twenty-four impressions per minute, eight impressions to eachplate upon the plate cylinder.

In printing from engraved, intaglio or undersurface plates, the wastagedue to an improper packing of the lines of the plate by the wiping andpolishing cloths is always high, and the speed of operation of machinesusing such plates has been limited to the speed stated above because oflimitations in the effective action of the Wiping and polishing cloths.

The pressures used in making impressions from the plates are very great,and the rapid breaking down of the make-ready upon the impressioncylinder or D-roll has resulted in a substantial loss (ill. lill-l55) inthe average daily output of such machines. The avoidance of rapiddestruction of the makeready of the impression cylinder or D-roll hasalso been a factor in limiting the speed of operation of such presses.

With the use of high pressures, vibration about the machin is great,even at the speed of operation above indicated, and the intermittentengagement and disengagement of the impression cylinder or D-rol1 withthe plate has been a large contributing factor in the development ofsuch vibration.

It has long been endeavored to provide a rotary printing machine of thetype to which the invention relates, having an output, with the use of asingle plate, substantially equalling the output obtained with aplurality of plates.

Such a machine is disclosed in the patent to A. H. Smith, No. 1,511,307,by which machine it was attempted, by the use of a cylinder of smalldiameter, to increase the number of revolutions per minute of themachine without increasing the rate of movement of the plate beyond thatwhich in multiple plate machines has been found to give satisfactoryoperating conditions.

The difiiculties encountered with the machine of the Smith patent werethe inability to bend or curve the plates upon an arc of the shortradius required by a plate cylinder of small diameter, and of securing aproper wiping and polishing of the plate with higher cylinder speeds.

With the above conditions in mind, I have produced a rotary printingmachine using thereon intaglio, steel or undersuriace printing plateswhich, with a single plate, has an output of two or more times theoutput of the machines of this type heretofore used, when two plateswere used upon such machines. This result has been secured by soconstructing the wiping and polishing mechanisms as to minimizevibration in these parts, and irregular movement thereof due to inertiawhen reversing the direction of movement of the bars, and by reducingthe reciprocatory speeds of these bars while in contact with the plates,although, as measured by the number of revolutions per minute of theplate cylinder, the number of reciprocations of said bars per minute ismaterially increased as compared with a machine operating at lowerspeeds.

In addition to the use of Wiping and polishing bars of light, rigidmaterial having high compressive strength, I provide other attachmentsand adjustments ensuring a smooth movement of the bars, and adjustmentdevices permitting a proper timing in the operative moment of thedifierent bars in order to secure an effective wiping action at higherspeeds of the plate.

In order to reduce vibration resulting from wear upon the bearing endsof the Wiper bars and the bearings co-operating therewith, I provide apressure i'ei a In eonjunetien W for maintaining nnife 'm pressureyteetingerea' of ti,

'piate cylinder i' hiiemeking an impression. This I adjustment is erewhich is requii edbeeziuse efthe' varying'een V in' ciifferntpietes'ixiieh y I s xbe-used upon tl eplete eylincier n U s j r havrieuncl,fn theec uelepeiiation i emaehineeinbedyingfu f H fthewviper midpelisher bars, the provision ,of

special ferin efediuste blebearing ioreeehenci 6f eiea the plate 1100 1the plate cylinder,

pelishe be: mechanisms 'beire'refeirezl tofli ro vicie accuratemicro-men ieail; adjustment mean of the i impres he'entiiece Cylindeter'Jntien, that the eight of,

,nent of s uehyhere the, Speed 0 L1 L518 ns lhiliiii'llfiflhepiateeylinde1" with a Jenlin hwh teefjentpute the;

atirigqspeecl; I the controlling Ward its pimtin iz eniengrevei i Jennee ri pletee is the piopertpa eking of thelines Oi remove-,1 of allTilhe' inventi n consists in the novel feetiires construction and.combination of; parts; here] l f after set ferth"anddeeeribed; endimore'partzeup leily pointed out in the cleimshereto api ended.

Referring to the cilawings,

Fig. is siiiie elevation of the 'printihg'eeiipie thewiping andpelishing ineehanisms ,0? a

he invention "line embeclyinef-the intention;

6 the niechanisn' operating at eithef end of th impi 'eesion. Cfy t theplaten of bar and. the plate upon the -plzite cylinder; e s i Y e I Fig.8 is a cleteil View, partly broken away, of the ecljwting mechanismforeach of the eccentries upon the Ni 01' bar eccentric shaft and theiaft; and

construction thereof adjacent the pointfof en-- the wiper heijeepable ofminute and accurate ed1- e ge e5 he plate F justment, se asto, developand maintain a desired menhetween theplatensicarried hy "n9; andpiliishing cloths and: the entir he details '01 the WlpGli and 'plziteub'onithe rid' the tef onebar T819 i the machine contribute plate withink}: and" e; in propel ik from the'tep or non-printing) ei faee of theate; so es toevoicl smudgesiii on theimprint;

printin I, ftoiusepen impression cylinder; or -D-roli wh'ose cylinder.

is 2, similar sheet illiistreting the i ecip-i roeatione of the Wiperand polisher clothsine e,

e, eensiensecl planyiew ef the Dhell is aiietaiiiview upon enlargerscale of ie shaft, for securing a, proper 1e movements of said bars inrelation ceunterweight for the ec I I 9 use detail View of afreg'menterypertion of the imp essien cylinder or Dwell, showing the Yeageme 1 of m5; filth 1 the" forwa lr senthe plate cylinder. 1

o "like "perts'throughout ne'nv ne d1 ings; all --perts nf 1 ien embe s0i": thejpriht- 'm'l 'polisning mechanisms he impression cylinderefeuch' details form he tie 4 i ym gdiflm hes the lliefl in fixedbearings in; the

[upon zit-sheet oftpapei uncle:

aehineis indicated at" Iii; nism is pesitionedfet the le u fld'efllfsaidxfig'ure has n ed; or;,epplyingffpqwerto cefrem to the inipi es Vere old and well known; 7 1e store are not, shown the;

ete cylinder and the 'ime pressiee eylindeivjor -D ro11 may. be veveiitbei,

e'ehinesiri which three pietes are need,

meme te Big single plate is used, while it is being; 'perL t-here is nopressure exerted upon theplate I neler by theimpzeesion cylinder 01" Droll. The

' dy of the impre sion 'eyli'ndes: qr Droll is m v Ispacedinomthesnrfece of the plate cylindere 5 0 1 "1g. 7 is a deteilencl View, of one of the Wiper I f Oi pelisher hers 'snewing the,adjusting meeha-V nismfor regulating the'pressure relation betweenistanee approx the"thicknessof; the

; printing plate, but sufiiciently less than this dis" s I t ance toensure thedevelopment of "the 118665 s ry pressures; Accuracy ofadjustment of this the epei'etien of the meehine.

, In the machine shown 1 inthe drawings; two

.ing bars and. one polishing barere used, this i V l, Etfprectiee longvi oilcmed,in the "art. The 70/ e construction efeach wiper 101'polisher be; is the t 3 I oylindier 01'1 D-roll 32 or D-teli adjusting II *ig'e; 55 vand fi, will later ell/ hate eq-opei atingjq e theimgression cyl nder"or D nali are sueh,m,, es tohavethe latte? ma? e2:"aim of" the pletecylinder g a'eo1n1nonpmetiee in i 5 ti 'Q i 'psgj sito the gni e g e oi'the drawingsiitwiliy T-bepneteci t at thewipirigand; polishing of the plete eccurs whiiethe plate is passing about the vlot/ercircumferenceoftheplatecylinder; softha t 55 Whe tionjefl themembei'sef' the printing couple 55,

voids some of the vibrat on which develops with link connections knownin the art and therefore not shown in the drawings.

. The wiper and polisher bars extend from side frame to side frame ofthe machine, below the plate cylinder. The opposite ends of each bar areprovided with polygonal bearing portions. Each bar is provided with anenlarged platen head covered by several plies of felt or other suitableyieldable material permitting the wiping or polishing cloth to adaptitself to slight surface ir-= regularities or fiurries in the plateresulting from the bending or tempering of the plate. It is a commonpractice to use a single web of wiping material successively passingover the platens of the two wiping bars, and a single web of polishingmaterial passing over the platen of the polishing bar.

The general arrangement heretofore described is old and well known, thestructure shown in the accompanying drawings varying from correspondingstructures used prior to the invention in the following respects:

ihe wiping and polishing bars are each made of a metal having a specificgravity lower than steel, but high compressive strength, this being acharacteristic of certain aluminum alloys. The design of the bar is alsosuch as to provide the desired stiffness intermediate the ends of thebars with a small mass of metal.

As shown in Fig. 2 of the drawings, the flattened extended head of thebar it is provided with a central, longitudinally extending web itmerging into the bearing ends it and l"? which are polygonal in shape,to prevent any turning of the bar. The felt covering for the bar isindicated at it, several plies of that material ordinarily being used.By using light weight metal in the bar, and

limiting the mass of such material as much as is consistent with theretention of the desired strength in the bar, the moving inertiadeveloped by the bar is reduced to a minimum and that vibration ortremble of the bar resulting in chattering, when reversing the directionof its movement is substantially eliminated. This feature is of majorimportance because slight chattering of the bar during its vibratorymovement at the opposite ends of each stroke tends toward an imperfectwiping action. The inability to avoid such chattering, was one of thecontributing causes limiting the speed of the machine, and theelimination of such chattering, therefore permits operation of themachine at higher speeds. In fact, as will more fully appearhereinafter, the machine of the invention may be operated atapproximately four times the speed of the old type machines, theavoidance of such chattering, or of any hesitancy in the reversal of themovement of the wiper and polisher bars, being a material factor in thedevelopment of such higher speeds.

The wiper driving shaft is shown at i Q, and the eccentric shaft drivingboth wiper platens is shown at 26. The shaft Ell is connected with theshaft l9 by a speed reducing gearing 25, the speed ratio of said gears,in the form of the invention shown, being substantially ii to 8, withthe shaft 2@ having the lower speed.

Carried by the eccentric shaft 28 are two eccentrics 22 and one adjacenteach wiper bar. Power is transmitted from the eccentric 2?; to its wiperbar by a strap and link connection 2t, and power transmitted from theeccentric to its wiper bar by a strap and link connection The strap andlink connection used is of old and well known construction.

Each eccentric 2223 is mounted for circumferential adjustment about theshaft 20 by a mechanism shown in detail in Fig. 8, to be later describedherein.

While this adjustability of the eccentrics is topermit a desired settingof the eccentric when assembling the wiping mechanism, it is primarilyfor the purpose of permitting a differential setting of the twoeccentrics 22 and 23 to time the movement of the wiper bars actuatedfrom said eccentrics to secure a controlled crossing of the lines ofwipe of webs fed across these bars in relation to each other, as shownin Fig. 4 of the drawings. This is done by advancing the stroke of onebar in relation to the other.

Carried by the shaft 26 is a counterweight 25, the greater mass of metalof which is preferably so positioned as to be most effective at each endof the stroke of the wiper bar. Because of the adiustability of oneeccentric in relation to the other, the setting of the counterweight inrelation to the eccentrics can be only approximate. This counterweightnot only secures a balanced condition about the eccentric shaft, butalso, at least partially, counteracts the weight of the wiper bars.

The first wiper bar is indicated by the reference numeral E ia in Fig. 1of the drawings, and the second wiper bar by the reference numeral Mb.

The polishing mechanism embodies a single polishing bar Mo, driven froma polishing bar eccentric shaft 27 by means of an eccentric 28 and aconnection, consisting of the usual strap and link construction 29,between this eccentric and the polishing bar.

The shaft ii is driven from a polisher driving shaft til. This shaft 36preferably has a speed in relation to the shaft iii, in a ratio of 4 to3. The shaft 2? is connected with the driving shaft 39 by the connectinggearing 38, the ratio of the gears of which is substantially i to 3. Thee centric Ed is adjustably mounted upon the shaft 2'? by a mechanismcorresponding with that used in mounting the eccentrics 22 and upon theshaft 2b. The adjustability of this eccentric is for the purpose oftiming the polishing action in relation to the crossing of the lines ofwipe of the wiper bars.

Carried by the shaft 2? is a counterweight 32 having the sameconstruction and setting as the counterweight 26 upon the wiper shaft28, and having the same action in avoiding vibrations in the polishingmechanism at the opposite ends of each stroke of the polishing bar.

While, with an eccentric and strap drive, there will be a varying speedof movement of the bars from one dead center to the opposite deadcenter, the use of counterweights, in the manner described, upon theeccentric shafts, will act much in the same manner as a flywheel insecuring a smooth passing of the dead centers.

In the embodiment of the invention shown in the drawings, the shaft l 9has approximately 22.5 revolutions, and the shaft 3% approximately 30revolutions, to each rotation of the plate cylinder. With the speedratio described between the shafts i9 and 3t) and the plate cylinder,and between said shafts respectively and the wiper and polisher shafts29 and 2?, each wiper bar will have one full reciprocation with slightlymore than five and one-half inches of travel of a plate upon the platecylinder, and the polisher bar will have one full reciprocation withslightly over four inches of travel of the plate.

While, in actual practice, these conditions have given highlysatisfactory results, so far as clean wining and polishing of the plateis concerned, it is obvious that the figures given are not critical. Itmay be added that when making thirty impressions per minute, theperipheral speed of the plate cylinder is approximately 260 feet perminute, or almost four times the speed of ordinary rotary presses of thetype to which the invention relates. The various speed ratios given aresuitable for even a higher speed than thirty revolutions per minute ofthe plate cylinder, however.

With speeds greatly in excess of those given, vibrations interferingwith the proper wiping and polishing of a plate develop.

The stated number of impressions per minute is with the use of a singleplate II.

The steel plate, with conditions as shown in the accompanying drawings,will extend throughout slightly less than one-quarter of the peripheryof the plate cylinder, although such plates vary not only as to lengthbut as to width.

The amount or" pressure exerted between the wiping web and the plateupon the plate cylinder is slightly greater than the pressure requiredbetween the polishing web and the plate. The latter is required oniy toremove any ink from th non-printing surface of the plate which has beenleft by the wiping web, while the wiping web is required to fill andpack the lines of the plate with ink in addition to removing, byabsorption, excess ink from the non-printing or top surface of theplate.

While both the wiping and the polishing webs are advanced'for a shortlength following each wiping and polishing operation, the wiping websbecome heavily saturated with ink, and this is relied upon in largemeasure to secure a more effective filling and packing of the lines ofthe plate. Such saturation of the wiping web, however, may result inslight ink streaks upon the top or non-printing surface of the plate,but these will be removed by the polishing web.

Another cause of excessive vibration in a machine of the type to whichthe invention relates, has been the result of violent impact between themakeready of the impression cylinder or D-roll at the rear of the recessin said cylinder, with the forward. edge of the plate. To avoidvibrations from this source, this edge of the recess in, or nose of, theimpression cylinder or D--roll formed upon a curve of long radiusmerging into the periphery of the impression cylinder or D-roll in amanner to ensure a smooth, initial rolling contact between the makereadyupon said cylinder and the forward edge of the plate.

This construction is shown at 33 in Fig. 9 of the drawings, themakeready sheets being shown at 34 and the outer blanket at 35. Themanner of mounting the makeready upon the impression cylinder or D-rollis that commonly employed prior to the invention.

By making the portion or nose 33 upon a curve of long radius asdescribed, the jar of initial impact between the impression cylinder orD- roll and the plate H is practically eliminated,

and damage to the makeready requiring stoppage of the machine to effectrepairs, is avoided.

In a machine embodying the invention using extremely heavy pressures andoperating at the high speeds of which the machine of the inven-' tion iscapable, violent impact of the impression cylinder or D-roli and theplate upon the plate cylinder, due to a high speed of rotation of saidcylinders, thus setting up continuing vibrations which interfere withthe proper wiping and polishing of the plate, is avoided.

In Fig. '7, of the drawings, I have shown a view atone end of one of thebars l4a, Mb or Me of the pressure adjusting and regulating mechanismfor each wiper or polisher bar, this mechanism being duplicated upon theopposite ends of eachwiper or polisherbar.

In machines prior to the invention, the bearing ends of the wiper andpolisher bars passed through side bearing openings in the side frame ofthe machine and were mounted between an upper and a lower bearingmember. The lower member was spring supported, and the upper member wasacted upon by an adjusting screw by which the tension of the spring andthe pressure relation between the platen and the plate, arising from theaction of this spring, were determined. With this construction, thespring support for the lower bearing members, with impact of the forwardedge of a plate with the head of a wiper or polisher ,banyielded, andtended to set up continuing vertical vibrations in the wiper andpolisher bars which, with the operation of the machine at higher speeds,was found to interfere with a proper wiping and polishing of the plateand packing of the lines therein.

To overcome this difficulty, I provide rigidly supported bearings forthe ends of the wiper and polisher bars, and control thepressurerelation between the platen of said bar and a plate upon theplate cylinder,by adjustment of the bearings for the ends of the wiperbar toward and from the plate cylinder, so that the pressure relationbetween the platen and the plate is determined by the setting of thebars and the flexibility or compressibility of the material of theplatens carried thereby.

Referring to Fig. 7 of the drawings, the side frames of the machine areprovided with bearing openings 36 for the passage of the ends of thewiper and polisher bars. Slidably mounted upon the frame of the machineat each bearing opening, by means of four posts 3?, is a top bearingplate 38 and a bottom bearing plate 39 of anti-friction metal. The topand bottom bearing plates 38 and 39 are attached to the posts 31 andhave a close sliding fit with the bearing end [6 or ll of the Wiper orpolisher bar.

Each movable bearing membercomposed of the posts 31 and the top andbottom bearing plates 38 and 39 is slidably mounted in relation to theside frame of the machine to permit them to be vertically adjusted tosecure the desired pressure relation between the platen of a wiper or apolisher bar and a plate I l by an adjustable supporting mechanismpermitting no vertical movement of the bearings after they have oncebeen adjusted.

This supporting mechanism consists of an extension it carried by thelower bearing member, and having a T-slot 4| toward the bottom thereof.Mounted in this T-slot is the enlarged head 42 of a micrometer screw 63having screw threads M co-operating with screw threads upon a verticallyadjusted rack 45. This rack constitutes a part of an old and well knownform of throwoff mechanism for moving the wiping and polishing bars outof their plane of engagement with the plate ll to permit the threadingof the wiping or polishing web through the machine, and forms nopart ofthe present invention. Hence, it is not shown in detail.

Carried by the housing 46 for the rack 45 is an index finger 41co-operating with a graduated sleeve 48 carried by the micrometer screwM. The screw M is provided with an actuating handle 49 by means of whichthe micrometer screw and the sleeve 48 carried thereby, may be turned tosecure a desired minute adjustment of the wiper or polisher bar, asindicated by the graduations upon the sleeve it. The sleeve 48 isprovided with a series of notches engageable with a spring lock member54 for holding the micrometer screw against displacement as a result ofvibration in and about the machine.

Acting upon the top bearing plate 38 is a spring 52 inclosing a springstud 53 upon the bearing plate. The sole function of this spring is totake up any possible minute looseness between the block 40 and the head42 of the adjusting screw, and it has no use in preventing thedevelopment of vertical vibrations in the Wiper or polisher bars as aresult of the impact of the plate therewith. If desired, this spring maybe dispensed with.

Another source of the development of vibrations in and about the machinewhich, prior to the invention, necessitated the operation or" themachine at low speed, was an inaccurate setting of the D-roll inrelation to the plate cylinder. Curved steel plates and the position ofthese plates upon the plate cylinder during the makeready of themachine, may result in the surface of the plate, at one side, beingspaced from the impression cylinder, a greater distance than at theother side. When the bearings for the arbors at opposite ends of theimpression cylinder or D-roll are independently adjustable, it isdifficult to properly regulate the pressure toward the opposite ends ofthis cylinder, particularly when it is understood that very heavypressure must be exerted by the impression cylinder or D-roll upon theplate on the plate cylinder.

In the embodiment of the invention shown in the drawings, the arbors ofthe impression cylinder or D-roll are mounted in bearings 3 formed in abearing block 55 slidably mounted in the side frames of the machine.Each bearing block is supported by a spring 56 which is a part of theimpression cylinder or D-roll throwoff mechanism. It forms no part ofthe present invention and is not shown or described in detail, beyondthe co-operating cams 5'5 operative upon each block, the relativemovement of these cams in one direction moving the bearing block againstthe tension of the spring 56, and relative movement in the otherdirection permitting this spring to raise the bearing block so as tomove the impression cylinder or D-roll out of the operative relation tothe plate cylinder. One of these cams is actuated by a gear 58 carryinga stem 59.

Mounted in a screw threaded extension is a micrometer screw 60co-operating with interior screw threads in said extension and actingupon the bearing block through the stem 59. Said screw is provided withahead 55 having suitable openings therein for a wrench to be used in themanual actuation of the screw.

Carried by the screw adjacent said head 6! is a worm wheel 62, one faceof which bears upon a bearing bracket 53 for a worm shaft fi l carryingtwo worms 55 and t6 co-operating respectively with the worm wheels atopposite ends of the impression cylinder or D-roll.

Carried by the micrometer screw below the bearing bracket 63 is agraduated collar 6? cooperating with which is a gauge finger 68.

Bearing upon the top frame of the machine is a lock nut 69 mounted uponthe micrometer screw, this lock nut having an operating handle it.Between the lock nut and the portion of the screw adjacent the graduatedcollar is what is known as a safety collar ll slidably mounted upon thescrew threads of the micrometer screw Bil.

The shaft E l has, in the length thereof, two universal joints l2 and itto permit the end portions of the worm shaft Md and 5th to be upondifferent vertical planes under conditions where a differentialadjustment of opposite ends of the impression cylinder or D-roll isrequired.

Carried adjacent one end of the shaft E i is a collar i l havinglongitudinal channels extending th-erethrough, as indicated at it. Thiscollar co-operates with a pin it carried by the shaft. Normally, thiscollar is so set that the pin it will engage the end of the collar andthus prevent the reaction from the worm screws imparting anylongitudinal movement to the shai't. Ii the collar, however, is set sothat the projecting ends of the pin '86 are in alinement with the slot75, then by turning the shaft t l, even though the collar M be turnedwith the shaft, the reaction upon the worms 65 and fit will causelongitudinal movement of the shaft, which is permitted by the sliding ofthe ends of the pin it along the slots l5 in said collar it. Thisconstruction is for the purpose of permitting the worms (it and 83 to bedisengaged from their respective worm gears 52, so as to permit theturning of the micrometer screw independently of the worm shaft.

It will be noted that when either screw 653 is turned independently ofthe portion of the worm shaft co-operating with the worm wheel 62carried thereby, said worm gear will be brought to a differenthorizontal level from the other worm gear, as will one bearing 63 inrelation to the other bearing 53. While this ensures the worm 65 or 65upon the worm shaft being properly positioned in relation to itsco-operating worm gear, irrespective of the relative position of saidgear and the other worm gear, it is necessary to provide the universaljoints l2 and it in the length of the shaft 64 to compensate for thedifferent levels of the bearings 63 in relation to each other.

The shaft 84 is provided with a squared end, as shown, to permit the useof a wrench or handle in turning said shaft.

Mounted upon the wiper eccentric shaft Bil and the polisher eccentricshaft 2?, adjacent each bar, is a collar ll having a. bearing boss '58concentric with said shaft. Rotatably mounted upon said bearing boss '58is a member is having an eccentric portion co-operating with the strap24, 25 or 29, having a head flange 88 provided with openings for awrench. Secured to the bearing boss l8 by means of suitable screws is aclamp plate 8! bearing upon the flange 8d. The screws 82 lock theeccentric member 79 in any position in which it may be adjusted, throughthe clamping action between the plate 8i and the head flange 85. Theplate 8! has a sliding fit with the eccentric shaft and is provided withsuitable gauge markings adjacent the periphery thereof so as to permitaccuracy in the adjustment of the eccentric.

By means of adjustable eccentrics as to each wiping bar, as well as thepolishing bar, the timing in the relative movements of these bars may beadjusted in relation to any plate, so as to secure the most effectiveaction of the wiping and polishing webs in relation to that plate. The

or the polishing is merely for the purpose of securing a desiredmovement of each in relation to the others in order. to determine theproper crossing point of the lines of wipe as to each in relation to theother. This is illustrated in Figs. 3 and 4 of drawings and will beexplained when describing the operation of the machine in its entirety.

The operation of the herein described rotary printing machine issubstantially as follows:--

The use of light weight wiper and polisher bars, of counterweightedshafts for reciprocating same, and of the various adjustment andactuating mechanisms described, avoids the develop,- ment of vibrationsin and about the wiping and polishing bars to an extent to permit anefiective wiping and polishing of a plate with a speed of rotation ofthe members of the printing couple greatly in excess of that which waspossible in machines of the type to which the invention relates prior tomy invention.

Equalization. oi the pressure between the en tire contacti g area of theinalieready of the hem pression cylinder or Enroll and theplate, andbetween the wiper polisher platens and the plate, not only contributestoward the reduction of vibrations uiting in improper wiping andpolishing of the but toward the making of perfect impressions .iroin theplate.

A proper timing of the d ciprocations the and polisher bars in relationto the ts" of the plate, and toeach other, permits a r ore effectivewiping and polishing of the plate, and variation. in the wiping andpclisl'ling action vn plate bearing different designs.

The secured by he use of wiper and pollsher hrs of a metal, such analuminum alloy, having low specific gravity compared with steel andgreater flity as compared with other light weight materials, and theavoidance of chattering of su h bars by the use of coun terweightedeccentric shafts, been fully described heretofore.

The use of the various adjustment mechanisms will now be described.

During the malreready of the machine, it is necessary, after a plate hasbeen mounted upon the plate cylinder, to adjust the wiper and polisherbar platens secure the proper development of the p s ure between saidplatens and the plate; to adjust the several eccentrics to secure aproper t ng o rec'lprocations of said bars, and to ad ust s 1. 1 rollrelation. to late on he plate cylinder.

The speed of mo ent of too wiper and polisher hers is fixed by t at ofthe driving shafts l9 and Ell and the gear-ii and Si connecting saiddriving with the wiper and polisher shafts til and i As heretoforstated, the polisher shalt reater speed of rotation than the wipershaft, but the reduction between the shafts l9 and by the gearing 2|, isless than that effected by the gearing 3% between the shafts Ill and 5d.

During the makeready of the press, a steel plate l l is mounted upon theplate cylinder in a position to have the forward edge of the plateengage the nose oi impression cylinder or D-roll when making eachimpression. lhe backing sheets at and the blanket of the D-roll are'"ect and return removeinent to the worm gears ride out of engagementwith said worm gears,

amaess then mounted. upon the impression cylinder or D-roll it. Eitherthe makeready of the impression cylinder or D-roli or the plate may varyin thickness in different portions thereof, although this variation willnever be great.

The amount of inl: required by the depth and width of the depressedlines upon the plate will also vary in different plates, and indifferent portions as to each. These conditions sometimes require adifferent adjustment at opposite ends of npression cylinder or D-roll inorder to establish the proper pressure relation between same and t" eplate to ensure the proper withdrawal of the from the lines of the platewhen making impression.

During the makeready, the shaft @4 is actuated to bring both gauge ringsat each end of the impres on cylinder or D-roll, to the zero position,thus bringing the arbors of said cylinder or D- roll into properhorizontal alineinent. The micrometer screw it of each wiper andpolisher bar is then actuated to set the gauge sleeve 48 at the zeroposition, said bars being lowered by the throwoif mechanism includingthe rack 45, during this adjustment. No adjustment of the cocentrics isrequired at this stage of the makeready.

Power is then applied to the machine for a trial run. i

According to the condition of the impressions made, the followingadjustments will then be made:-

The shat t is first actuated to impart vertical adjustment to thebearing blocks 55 by means of the wo ns and upon the worm shaft 64 ans"I11 carried by the micrometer screws ill opposite ends of theimpression cylinder or D-roll. If it is found that a perfect impressionis ecured by this adjustment, no further adjustment or" the impressioncylinder or D-roll is required. If it found, however, that the pressuredeveloped toward one end of the cylinder is not suniciently great, thecollar 14 is brought to the position shown in Fig. 5 of the drawings,with. the slot therein alined with the pin '55, so that with subsequentturning of the shaft the worms and will impart no thus ermitting eitherscrew to be actuated independentiy of the other until a proper presbutwill merely I sure relation between the impression cylinder or lJ-rolland different portions of the plate is established.

ihe ends and S ill of the shaft will be brought to parallel horizontalplanes with movement oi the bearing bracket 63 adjacent the micrometerscrew 66 which has been thus independently actuated, this beingpermitted by the universal joints it and in the length of said shaftbetween said ends and Mb.

By a reverse longitudinal movement of the shaft fi l, accompanied by aturning movement of said shaft, said. worms G5 and may be re-engagedwith both worm gears =2, so that if a subsequent variation of pressurebetween the impression cylinder or D-roll and the plate is required, thescrews Gil operative at each end of said impression cylinder or D-rollmay be simultaneously actuated by the turning of the shaft 64, either toincrease or relieve the pressure.

When adjusting the impression cylinder or D-roll it, it should bedisengaged from the plate 5 i, so that this adjustment is merely againstthe tension of the spring 55 acting upon each bearing frame 55. Thedevelopment of pressure results from the power applied to the impressioncylinder or D roll, following the engagement of the plate with theimpression cylinder or D-roll. Such adjustments may be required duringthe run of the machine, due to changing conditions in the makeready ofthe impression cylinder or D-roll.

Accuracy in the pressure conditions between the impression cylinder orD-roll and the plate avoids any such minor distortion of the platecylinder, or parts appurtenant thereto, which might interfere with theproper wiping and polishing of the plate, or the setting up of rhythmicvibrations in said plate cylinder.

It will be noted that while the impression cylinder or D-roll isadjusted against spring tension, the bearing frames 55 are held againstupward movement as a result of the pressures developed by reason of theconstruction of the adjusting mechanism shown.

During the trial run of the machine, the inking mechanism, not shown inthe drawings, is adjusted so as to apply ink to the entire surface ofthe plate in the quantity required by the design upon the plate.

The various wiper and polisher bars are then moved away from the platecylinder by the throwofi mechanism operative thereon, and the variousscrews 43 actuated to bring the gauge sleeve 68 into zero position inrelation to the gauge finger 41. While said bars are moved away from theplate cylinder, the wiping and polishing webs, one of which is indicatedat A in Fig. 7, are

' threaded through the machine in the usual manner, one web passingabout the heads of the wiping bars Ma. and Mb, and a second web passingabout the head of the polisher bar Mic. The throwofl. mechanism is thenactuated to move said bars toward the plate cylinder, and the micrometerscrews 43 of each bar may thereafter be actuated to establish the properpressure relation between the wiper bars and the plate upon the platecylinder, as determined by the results secured during the trial run ofthe machine.

The adjustment of the various wiper or polisher bars may be made whilethey are either in or out of the engaging relation with the platecylinder. The screws 33 operative upon the opposite ends of each bar maybe differentially adjusted according to the conditions developed duringthe trial run of the machine.

The upper and lower bearings 38 and 39 for the ends of the bars arealways in engagement with the bars, and by reason of the use of theposts 3?, move with the bars toward or from the plate cylinder. It willbe noted that these bearings are so supported by the adjusting screw 43that a bar can have no movement toward or from the plate cylinder afterit is brought into the desired adjusted position, any yielding of thebar in relation to a plate resulting solely from flexibility in the padI8.

As stated, the spring 52 acting upon the top bearing 38, has no functionbeyond the holding of the bearing frame in engagement with the head 4!of the adjusting screw, a condition, however, which will result fromtheaction of gravity without the assistance of this spring.

The sleeve 48 with its graduations, permits a determination of theamount of adjustment at either end of a bar in relation to the other.These graduation marks represent .001 of an inch, and the spring lockmember 5i is operative at intervals of .001 of an inch. Variation inadjustments of less than this amount is of no moment in securing thedesired operation of the wiping and polishing mechanism.

While ordinarily, adjustment of the bearings at opposite ends of the barwill be the same, it is possible to vary the adjustment at one end to asmaller extent in relation to the other end, for the same reasons asadjustment of opposite ends of the impression cylinder or D-roll issometimes necessary.

During the Wiping and polishing of the plate, the plate has angularmovement and the wiper and polisher bars have movement axially orlongitudinally of the plate cylinder. These two combined actions resultin a wipe or polish, the action of which is from side to side of a platewith a component of action from end to end of the plate determined bythe speed 01" the wiper or polisher bar and the speed of the press.

This condition is represented in Figs. 3 and 4 of the drawings. In Fig.3, the curve of the wiping action of one wiping bar, as I ia, is shownin full lines at a; the curve of action of the other wiping bar, Mb, isshown in dotted lines at b, and the curve of action of the polisher baris shown in dot and dash lines at c. The arrow 11 indicates thedirection of movement of the plate, and the arrow 6 indicates thedirections of movement of the various bars. In this figure, the curve isthat developed in a rotary printing machine having eight revolutions perminute.

In Fig. 4, I have shown a similar diagram illustrating the wiping andpolishing conditions in the machine of the present application, whichhas a speed of approximately thirty revolutions per minute.

The speeds above referred to are the revolutions of the plate cylinder.

The diagrams are shown in connection with a plate twenty-two andone-half inches in length in each instance, although the diagram wouldbe the same irrespective of the length of the plate, since the curverepresents the wiping and polishing operating conditions for eachrevolution of the plate cylinder.

In Fig. 4, the action of the wiping and polishing bars is indicated bythe same reference charact-ers as in Fig. 3, as are the arrowsindicating the two directions of movement of parts resulting in thecurves shown.

Two pronounced differences are disclosed in these two diagrams. One ofthese is in the crossing point of the lines of wipe and polish, and theother is in the number of strokes per revolution of the wiping andpolishing bars. It will borne in mind that these diiferences do notresult merely in the change of the number or" revolutions of the platecylinder per minute, since in each 1nachine represented by thesediagrams, the curves would be the same irrespective of the number ofrevolutions of the plate cylinder because the wiper bar speeds ofreciprocation increase proportionately to an increased speed of theplate cylinder. The wiper and polisher bars have a movement from side toside of the plate of approximately one inch, which is the component ofmovement represented by the arrows e.

In the form of the invention shown, the plate has an angular movement ofabout five and onehalf inches during each direct and returnreciprocatory movement of the wiper or polisher bars, which is a rightline movement. Under the conditions shown in Fig. 3, the plate has amovement of only four and one-half inches during one completereciprocation of the said bars.

65 facilitate nicety intl e adjustment o It has been found, in actualpractice, that condition shown in Fig. not ed iit a satisfactory Wipingand poll ing e1- plates when the piate cylinder has thirty UlUiE revolutions per minute. a q p I It'vvill be noted that each of the curves in3" 4 seems to he flatter than the curves shown in Fig.

3, because of the greater component of e ment due to circumferentialtravelof the plate or the angularmoveinent oithe plate cylinder. lhiscondition secures both a more eiiective Wiping and a moreeilectivepolishing o the 1g shafts and mid, er

tionof the plate cylin-s compa number of reciprccations of the polishpolisher bar having number of recip rocations.

The angular moveinentof thepiatein relatioir to the Wiping bars, isefloctivc insccuring 3.9 er filling'and packing of the and net standingthe increased IlJlTiilJQl revolutions p ,minute of the plate cylinder, wh the conditions shown in Fig. 4, as effective filling and sizing ,ofthe lines of the plate secured, notwi ing the" conditions shown in 3. rr p 7' The two Wiper bars Ma and 54b and thepolisher bar Mo arespaced'iroin each, ct 'er in t direction movement of the plate 40, ingand pols hinggand in order to crossing of the lines of Wipe, as .i: 4, adifferential setting of the eco upon the respective hers is necessa v:In Fig, 3, a conditicn is shown 45, a hit and adjustment of sale.

which was found not to hei'effective vvh ing the machine at speeds, for"ma-chin this type. I To permit contrel of the of cross. the wipe, Ihave provided the eecen' ica mechanism, shown in F. 8; la and timing ofeach bar be a cu;v y, "altered to adapt these ticular plate. Byloosening the the trio is may he turned upon boss '63, so as to c" the ting cf the in, tion of each reciprocator y mo ment of any". a

' in relation to the other bars.

The collar 1? is secured to the sthe shaft 2'! so as to he revolul isthen the eccentric 19 may he turned about the a, of said shaft 251 andlocked inanyadjustcdposition means of the clamp plate at and the lockscrews 82. if The gauge markings about the plate. I I

In a machine embodying invention,

positive support of the hearings tor the sp een e ends of each wiper orp oii'sher has p p development of rhythmic vibrations 1n j which willinterfere With uniformity in. the ni and polishing conditions at altimes Whi plate is in the operative"relatiorrtosaid ha The use of barsof material having low specific gravity, as compared with steel or OthElIImtSJ-S the development of viorati a bar iorined oi an a" .gher speedoijthe asunder tne to the 'ctherato secure a des ous'wiper and pclishe bfoperationr of the machine at high speeds,

[animportant factor. N v

which the plate is intermittently engaged with,

in: late ents thv s commonly used, and possessii eluding flexure of thee itial contact or" the edge of the plate with the bar or from thepressures devel pied mentoi piatesj \vith'tlic cc" head M of the bars,reduces th of these bars to anextent to per versal of theirrcciprocatory movements wt" s or would interfere with the action uponthe plate.

The use of the counter shafts 2i] and 2'! contributes toward end;

By'iorining the nose, ion cylin- '15 deror D-roll in a curve of longirad: of impact'betvieen thefo-ru'ard e V and the impression cyl nder orD-roll are reduced to a minimunnif not entirely elir hated, thusavoiding the development oi vihrauons in. the 20, members of theprinting couplev ich' would tend to interfere with a proper action ofthe wipe ing and polishing Webs This h be n. If. d t be a contributingfactor'in per. ntting the ping up of the speed of the machine in themanner 25 herein described. Elhe tWoiactors which. have been'found tocoiitrihutemost toward the operation of the e of chatter "'2 directionof recipro- 3Q andpolisher bars, by the I rim-rum alloy or other duringeach ch metal having a low with steel, alone or COilFlCu. '1 the use ofco eri'veights upon the wiper and polishe; cccenti shafts, andthe'control or the nunil of ecipi-focations of the Wiper and polis eachrevolution of the fiatecylinder a V -g or the movement of each'of thesea d of the 40 -gs for the 1e 'mcchanisin' shown, by j rrldcha rhyti/tion of said hare is prevented lines of swiping action the The positivesupp rt of the a'so and disengaged from, the impression cylinder or"D-ro1l the Wiping and polishing bars, the tendency toward the setting upof vibrations is a greater than with the operation of the machine 55 atlower speeds, and the various mechanisms hercndescrihedhave been foundto operate suc-s I cessfully in reducing the amount of such vibrajticnto a point where a very high speed of the machine may be attained, althcugh if'a speed in excess ofhetween thirty'ancl forty revolutions" per.minute is attained, vibrations interfering with aprcper Wiping andpolishing or the plate may develop.

machine he ein described is particularly 5 p adapted for use With'oneplate upon the plate Wipingand polishing mechanism is operative upontheother plate. r

While the use of lightweight Wiper and polisher 1 bars, andthe provisionof adjustment means for the timing of the reciprocation of said bars in75 amass relation to each other will permit an increase in the speed ofoperation of a machine of the type herein described, the construction ofthe bearings for the ends of the various bars, the accurate adjustmentof the impression cylinder or D-roll, and the form of the nose of theimpression cylinder or D-roll each are contributing factors in securingthe maximum speed of operation of the machine with a minimum ofimperfect impressions.

It is not my intention to limit the invention to the precise details ofconstruction shown in the accompanying drawings, nor to the use of allof the contributing features, it being obvious that such details ofconstruction may be varied without departing from the spirit and scopeof the invention, and some of the advantageous characteristics may beomitted and yet permit the operation of the machine at a higher speedthan that heretofore attained by machines of this type.

Having described the invention, what I claim as new and desire to haveprotected by Letters Patent, is:

l. A rotary printing machine embodying therein a plate cylinder having aperipheral speed in excess of 175 feet per minute, an impressioncylinder or D-roll, a wiping mechanism including therein a Wiper bar, awiper shaft, and means whereby said bar is reciprocated from said shaft,a polishing mechanism including therein a polisher bar,. a polishershaft, and means whereby said bar is reciprocated from said shaft, andmeans minimizing vibration of said bars from moving inertia uponreversal of the movements ,.,of said bars, including therein speedreducing gearing operative upon said shafts respectively,

whereby with high angular speed of said plate cylinder, said bars willhave a plurality of slow reciprocatory movements with each revolution ofsaid plate cylinder, the wiper bar having one full reciprocation withsubstantially five inches of travel of the plate cylinder.

2. A rotary printing machine embodying therein a plate cylinder having aperipheral speed in excess of 175 feet per minute, an impressioncylinder or D-roll, a wiping mechanism including therein a wiper bar, awiper shaft, and means whereby said bar is reciprocated from said shaft,a polishing mechanism including therein a polisher bar, a polishershaft, and means whereby said bar is reciprocated from said shaft, and

means minimizing vibration of said bars from moving inertia uponreversal of the movements of said bars, including therein speed reducinggearing operative upon said wiper shaft and speed reducing gearingoperative upon said polisher shaft, whereby with high angular speed ofsaid plate cylinder, said bars will have a plurality of slowreciprocatory movements with each revolution of said plate cylinder, thepolisher bar having one full reciprocation with substantially fourinches of travel of the plate cylinder, the gearing operative upon saidwiper shaft, and the gearing operative upon said polisher shaft, beingrela- ,tively so proportioned as to impart a greater reciprocatory speedto said polisher bar than to said wiper bar.

3. A rotary printing machine embodying '"ierein plate cylinder having aperipheral speed in excess of 175 feet per minute, an impressioncylinder or B-roll, a wiping mechanism including therein a plurality ofwiper bars, a Wiper shaft, and a plurality of means upon said shaft andoperative upon said barsrespectively,

whereby said bars are reciprocated, a polishing mechanism includingtherein a polisher bar, a polisher shaft, and means whereby said bar isreciprocated from said shaft, and means minimizing vibrations of saidbars from moving inertia upon reversal of the movements of said bars,including therein speed reducing gearing operative upon said shaftsrespectively, whereby with high angular speed of said plate cylinder,said bars will have a plurality of slow reciprocatory movements witheach revolution of said plate cylinder, the wiper bar having one fullreciprocation with substantially five inches of travel of the platecylinder, and the polisher bar having one full reciprocation withsubstantially four inches of travel of the plate cylinder.

4. A rotary printing machine embodying therein a plate cylinder, animpression cylinder or D-roll, a wiping mechanism including therein awiper bar, a wiper shaft, an eccentric upon said wiper shaft, a strapco-operating with said eccentric and with said wiper bar, and meanswhereby said eccentric may be adjusted about its shaft, a polishingmechanism including therein a polisher bar, a polisher shaft, aneccentric upon said polisher shaft, a strap co-operating with saideccentric and With said polisher bar, and means whereby said eccentricmay be adjusted about its shaft, and means minimizing v.bration of saidbars from moving inertia upon reversal of the movements of said bars,including therein speed reducing gearing operative upon said shaftsrespectively, whereby with high angular speed of said plate cylinder,said bars will have a plurality of sloW reciprocatory movements witheach revolution of said plate cylinder.

5. A rotary printing machine embodying therein a plate cylinder, animpression cylinder or D-roll, a wiping mechanism including therein aplurality of wiper bars, a wiper shaft, a plurality of eccentrics uponsaid shaft, a strap cooperating with each eccentric and with a wiperbar, and means whereby each eccentric may be adjusted about its shaft toregulate the timing of the crossing of the lines of wipe, a polishingmechanism including therein a polisher bar, a polisher shaft, and meanswhereby said bar is reciprocated from said shaft, and means minimizingvibration of said bars from moving inertia upon reversal of themovements of said bars, including therein speed reducing gearingoperative upon said shafts respectively, whereby with high angular speedof said plate cylinder, said bars will have a plurality of slowreciprocatory movements with each revolution of said plate cylinder.

6. A rotary printing machine embodying therein a plate cylinder, animpression cylinder or D-roll, a wiping mechanism including therein aplurality of wiper bars, a wiper shaft, a plurality of eccentrics uponsaid shaft, a strap co-operating with each eccentric and with a wiperbar, and means whereby each eccentric may be adjusted about its shaft toregulate the timing of the crossing of the lines of wipe, a polishingmechanism including therein a polisher bar, a polisher shaft, aneccentric carried by said polisher shaft, a strap co-operating therewithand with said polisher bar, and means for adjusting said'polisher bareccentric about its shaft to regulate the polishing action of saidpolisher bar with relation to the wiping action of said wiper bars, andmeans minimizing vibration of said bars from moving inertia uponreversal of the movements of said bars, including therein speed reducinggearing operative upon said shafts respectively,

and non-yieldingly supported in relation to said plate cylinder.

13. A rotary printing machine embodying therein a plate cylinder, animpression cylinder or D- roll, a wiping mechanism including therein awiper bar, a polishing mechanism including therein a polisher bar, andmeans for imparting reciprocatory movement to said bars respectively,said wiper bar being formed of a metal having low specific gravity ascompared with steel and high compressive strength, whereby with highangular speed of said plate cylinder, said bars will have a plurality ofslow reciprocatory movements with each revolution of said platecylinder, and excessive moving inertia in said wiper bar will beavoided.

14. A rotary printing machine embodying therein a plate cylinder, animpression cylinder or D- roll, a wiping mechanism including therein awiper bar, a polishing mechanism including therein a polisher bar, andmeans for imparting reciprocatory movement to said bars respectively,said polisher bar being formed of a metal having low specific gravity ascompared with steel and high compressive strength, whereby with highangular speed of said plate cylinder, said polisher bar will have aplurality of slow reciprocatory movements with each revolution of saidplate cylinder, and excessive moving inertia in said polisher bar willbe avoided.

15. A rotary printing machine embodying therein a plate cylinder, animpression cylinder or D-roll, a, wiping mechanism including therein awiper bar, a polishing mechanism including therein a polisher bar, andmeans for imparting reciprocatory movement to said bars respectively,said wiper and said polisher bars each being formed of a metal havinglow specific gravity as compared with steel and high compressivestrength, whereby with high angular speed of said plate cylinder, saidbars will have a plurality of slow reciprocatory movements with eachrevolution of said plate cylinder, and excessive moving inertia in saidWiper and polisher bars will be avoided.

16. A rotary printing machine embodying therein a plate cylinder, animpression cylinder or D-roll, a wiping mechanism including therein awiper bar, a wiper shaft, a counter-weight upon said shaft, and meanswhereby said bar is reciprocated from said shaft, a polishing mechanismincluding therein a polisher bar, a polisher shaft, and means wherebysaid bar is reciprocated from said shaft, and means minimizing vibrationof said bars from moving inertia upon reversal of the movements of saidbars, including therein speed reducing gearing operative upon saidshafts respectively, whereby with high angular speed of said platecylinder, said bars will have a plurality of slow reciprocatorymovements with each revolution of said plate cylinder.

17. A rotary printing machine embodying therein a plate cylinder, animpression cylinder 0r D-roll, a wiping mechanism including therein awiper bar, a wiper shaft, and means whereby said bar is reciprocatedfrom said shaft, a polishing mechanism including therein a polisher bar,a polisher shaft, a counterweight upon said shaft, and means wherebysaid bar is reciprocated from said shaft, and means minimizing vibrationof said bars from moving inertia upon reversal of the movements of saidbars, including therein speed reducing gearing operative upon saidshafts respectively, whereby with high angular speed of said platecylinder, said bars will have a plurality of slow reciprocatorymovements with each revolution of said plate cylinder.

18. A rotary printing machine embodying therein a plate cylinder, animpression cylinder or D- roll, a wiping mechanism including therein awiper bar, a wiper shaft, a counterweight upon said shaft, and meanswhereby said bar is reciprocated from said shaft, a polishing mechanismincluding therein a polisher bar, a polisher shaft,

a counterweight upon said shaft, and means whereby said bar isreciprocated from said shaft, and means minimizing vibration of saidbars from moving inertia upon reversal of the movements of said bars,including therein speed reducing gearing operative upon said shaftsrespectively, whereby with high angular speed of said plate cylinder,said bars will have a plurality of slow reciprocatory movements witheach revolution of said plate cylinder.

19. A rotary printing machine embodying therein a plate cylinder, animpression cylinder or D-roll, a wiping mechanism including therein awiper bar, a wiper shaft, a counterweight upon said shaft, and meanswhereby said bar is reciprocated from said shaft, a polishing mechanismincluding therein a polisher bar, a polisher shaft, and means wherebysaid bar is reciprocated from said shaft, and means minimizing vibrationof said bars from moving inertia upon reversal of the movements of saidbars, including therein speed reducing gearing operative upon saidshafts respectively, said wiper bar being formed of a metal having lowspecific gravity as compared with steel and high compressive strength,whereby with high angular speed of said plate cylinder, said bars willhave a plurality of slow reciprocatory movements with each revolution ofsaid plate cylinder, and said counter-- Weight will be made moreeffective in avoiding excessive moving inertia in said wiper bar.

20. A rotary printing machine embodying therein a plate cylinder, animpression cylinder or D-roll, a wiping mechanism including therein awiper bar, a, wiper shaft, and means whereby said bar is reciprocatedfrom said shaft, a polishing mechanism including therein a polisher bar,a polisher shaft, a counterweight upon said shaft, and means wherebysaid bar is reciprocated from said shaft, and means minimizing vibrationof said bars from moving inertia upon reversal of the movements of saidbars, including therein speed reducing gearing operative upon saidshafts respectively, said polisher bar being formed of a metal havinglow specific gravity as compared with steel and high compressivestrength, whereby with high angular speed of said plate cylinder, saidbars will have a plurality of slow reciprocatory movements with eachrevolution of said plate cylinder, and said counterweight will be mademore effective in avoiding excessive moving inertia in said polisherbar.

21. A rotary printing machine embodying therein a plate cylinder, animpression cylinder or D-roll, a wiping mechanism including therein awiper bar, a wiper shaft, a counter-weight upon said shaft, and meanswhereby said bar is reciprocated from said shaft, a polishing mechanismincluding therein a polisher bar, a polisher shaft, a counterweight uponsaid shaft, and means whereby said bar is reciprocated from said shaft,and means minimizing vibration of said bars from moving inertia uponreversal of the movements of said bars, including therein speed reducinggearing operative upon said shafts respectively, said wiper and saidpolisher bars each all) being formed of a metal having low specificgrav-u ity as compared with steel and high compressive strength, wherebywith angular speed of said plate cylinder, said bars will have aplurality of slow reciprocatory movements with each revo said shaft, aneccentric upon said wiper shaft and astrap cogoperating with saideccentric and with said wiper bar, polishing mechanism including thereina pplishel' bar, a polisher shaft, a counter- 3 weight upon saidshaft,an eccentric upon said polishershaft, and a strap co-operatingwithsaid eccentric and with said polisher bar, andmeans minimizing vibrationof bars from moving inertia uponreversal of the movements of said barsincIuding thereinspeed reducing gearing ope "ativeuponsaid shaftsrespectively, said wiper and polisher oars each being formed oi metalhaving low specific gravity as compared with steel and high compressivestrength, whereby with high angular speed of said plate cylinder, saidoarswill havea plurality of slow reciprocatory movementswith eachrevolution q ments of saidbars, including therein speed reof said platecylinder, and saidcounterweights will be made more effective in avoidingexcessive 7 moving inertia said wiper and polisherbars,

"rotary printing machine embodying 23. 'A therein a plate cylinder, animpression cylinder or D-roll, the 'portion of said impressioncylinderor I D-roll which initially engages a plate upon said plate cylinderbeing formed in an arc of long radius, wherebyvibration resulting fromthe jar of contact of said impression cylinder or, Dsroll with theforward edge of a plate is minimized, a

wiping mechanism including therein a wiper bar,

I a wiper shaft, and means whereby said bar is reclprocated from saidshaft,-a polishing mechaa nism including therein a polisher'bar, apolisher shafts respectively, whereby with high angular speed of saidplate cylinder, said bars will have aplurality of slow reeiproeatorymovements with I each revoiution of said plate cylinder.

posits ends of said impression cylinder or D-roll, adjusting meansoperative upon said bearings respectively, 'an actuating mechanismsimultaneously operative upon botlroi saidladjusting means includingtherein means whereby the portion of said actuating mechanism engageablewith said adjusting means respectively may move vertically with theadjusting means into different horizontal planes, a wiping mechanismincluding thereina wiper bar, a wiper shaft, and means whereby said baris reciprocated from said shaft, 7 a polishing mechanism includingtherein a polisher bar, a polisher shaft, and means whereby said bar isrecipl'ocated from said shaft, and

rotary printing machine embodying therein plate cylinder, an impressioncylinder 3 or D-roll, vertically movable bearings for the pmeansminimizing vibration of said bars from moving inertia upon reversal ofthe movements of said bars, including therein speed reducing gearingoperative upon said sha ts respectively,

ivhereby with highangular speed of said plate (cylinder, said bars,willhave a plurality of slow reciprocatory movements with eachrevolution ofsaid plate cylinder.

25. A rotary printing machine embodying therein a plate cylinder, animpression cylinder or D-roll, vertically movable bearings for theopposite ends of said impression cylinder or D'- roll, adjusting meansoperative upon said bearings respectively, an actuating mechanismsimultaneously o'perativeupon both of said adjusting means, meanswhereby said actuating mecha nism may be selectively engagedwith, ordisengaged from, said adjusting means respectively,

means includedin said actuating mechanism whereby the portion ofsaidactuating mechanism engageable with said adjusting meansrespectively may movevertically with the adjusting means into difierenthorizontal planes, awiping mechanism including therein a wiper bar, awiper shaft,and means whereby saidbar is reciprocated from said shaft, apolishing mechanism including therein a polisher bar, a polisher shaft,and means whereby said bar is 'reciprocated from said shaft,

, and means minimizing'vibration of said bars from moving inertia uponreversal of the moveducing gearing operative upon said shaftsrespectively, whereby with high angular speed of said plate cylinder,said bars will have a plurality of slow reciprocatory movements witheach revolulicn of said platecylinder'. g I g g 26. A rotary printingmachine embodying therein a plate cylinder, an impression cylinderposits ends ofjsaid impressioncylinder or D-roll,

worm wheels respectively,

worm wheels respectively, means whereby said worm shalt may be flexedintermediate said bear ings, means permitting disengagement of said wormshaft from, or its engagement with, said worm. wheels, wherebysaidmicrometer screws may be independently actuated or simultaneousiyactuated, irrespective of the vertical positionof I or D-rolljvertically movable bearings for the "012- i the worm wheels upon saidmicrometer screws,

to regulatethe pressure'relation between said im- "pression cylinder orD-roll and a plate upon said plate cylinder, a wiping mechanismincluding therein a wiper bar, a wiper shaft, and means whereby said bar"is reciprocated from said shaft,

apolishing mechanism including therein a polisher bar, a polisher shaft,and means whereby means minimizing "vibration of said bars frommovinginertia upon reversal of the movements of said cars, includingtherein speedreducing gearing operative upon said shafts respectively.

said plate cylinder.

FRANK o. MARQUARDT.

said bar is reciprocated from said shaft, and a

